<template>
  <el-menu
    class="el-menu-vertical-demo" background-color="#545c64" text-color="#fff" active-text-color="#ffd04b"
    menu-trigger="click"
    
  >
    <h3 >{{isCollapse?'后台':'通用后台管理系统'}}</h3>
    <el-menu-item @click="clickMenu(item)" v-for="item in noChildren" :index="item.label" :key="item.path">
      <i :class="'el-icon-'+item.icon"></i>
      <span slot="title">{{item.label}}</span>
    </el-menu-item> 

    <el-submenu  v-for="item in hasChildren" :index="item.label" :key="item.path" >
       <template slot="title">
          <i :class="'el-icon-'+item.icon"></i>
          <span slot="title">{{item.label}}</span>
        </template>
     <el-menu-item-group>
        <el-menu-item :index="subItem.path" v-for="(subItem, subIndex) in item.children" :key="subIndex"
          @click="clickMenu(subItem)" >
          <i :class="'el-icon-' + subItem.icon"></i>
          <span slot="title">{{ subItem.label }}</span>
        </el-menu-item>
      </el-menu-item-group>
    </el-submenu>
  </el-menu>
</template>


<style lang="less" scoped>
.el-menu-vertical-demo:not(.el-menu--collapse) {
  width: 200px;
  min-height: 400px;
}
.el-menu{
  height: 100%;
  border: none;
  h3{
    color: #fff;
    text-align:center;
    line-height:48px;
  }
}

</style>


<script>
export default {
  data() {
    return {
      menu: [
       
      ],
    };
  },
  methods: {
    // handleOpen(key, keyPath) {
    //   console.log(key, keyPath);
    // },
    // handleClose(key, keyPath) {
    //   console.log(key, keyPath);
    // },
    clickMenu(item){
      this.$router.push({
        name:item.name
      })
      this.$store.commit('selectMenu',item);
    }
  },
  computed: {
    noChildren(){
      return this.asyncMenu.filter (item=> !item.children);
    },
    hasChildren() {
      return this.asyncMenu.filter (item => item.children);
    },
    isCollapse(){
      return this.$store.state.tab.isCollapse
    },

    asyncMenu(){
      return this.$store.state.tab.menu
    }
  },
};
</script>